Answer:
The correct answer is d) in conclusion.
Step-by-step explanation: The phrase "let me introduce you to the name of this course" suggests that the speaker is concluding their introduction. The phrase "in conclusion" is commonly used to signal the end of a speech or presentation, and is therefore the most appropriate option. The other options, "finally," "lastly," and "in the end," could also work in this context, but "in conclusion" is the most precise and formal choice.